For a kid like Lilly, Mr. Slinger is the best teacher ever. He loves the stories she writes and encourages her creativity with his Lightbulb Lab. But when she brings her shiny new purse to school and starts causing a distraction, Mr. Slinger has to take it away until the end of the day. Henkes perfectly captures the tumult of emotions that Lilly experiences—her passion for school and her favorite teacher, her joy in her new purse, her fury at Mr. Slinger, and her eventual regret when she draws a mean picture of him. Honest and funny, this endearing story reassures kids that it's okay to make mistakes—especially if they're followed by a sincere apology.